Anyone who reloads on a Dillon XL 650 press knows the issues with spent primers missing the stock spent primer cup and ending up all over the bench and floor. This upgrade creates a closed spent primer system so there is no way for the spent primers to exit the system and end up all over the floor or bench. With this upgrade you also will never have to worry about the spent primer cup over flowing and jamming the system because you can see when it needs to be emptied. The new spent primer cup also will hold 3 times as much (by volume) over the stock cup.
To achieve the full benefits of this upgrade it does require a Dillon Strong Mount and you will also have to drill 3 small holes in the side of your mount for the spent primer cup to clip to. (If you do not have a strong mount or do not want to drill the holes in your mount please see my non-strong mount version.)